FIELD: information technology.
SUBSTANCE: data medium includes an information control area and a user data area. At least one writing session has such a configuration that it contains at least one of at the at least one writing area. The control information contains identification information on the writing interval and heading. Information on the interval contains information on the start position and the last written position of the writing area. The heading contains information on the total number of records in elements of the writing area.
EFFECT: less information for identifying session boundaries and larger area for recording user data.
3 cl, 25 dwg
